2026 ICD-10-CM Diagnosis Code M05Rheumatoid arthritis with rheumatoid factor
ICD-10-CM M05
M05 is a non-billable ICD-10-CM category code for rheumatoid arthritis with rheumatoid factor, so it cannot be submitted on claims. Use a more specific code from this category instead, such as M05.00, M05.011, M05.012, and M05.019.
Code Identity
ICD-10-CM Code
M05
Billable Status
No — Non-Billable Category
Code Describes
Rheumatoid arthritis with rheumatoid factor
Chapter
M05-M14
Inflammatory polyarthropathies
Code Classification
Specific Coding for Rheumatoid arthritis with rheumatoid factorOverview
Non-specific codes like M05 require more characters. Use one of these billable codes instead:
M05.0 for Felty's syndrome
Use M05.00 for Felty's syndrome, unspecified site
M05.01 for Felty's syndrome, shoulder
M05.02 for Felty's syndrome, elbow
M05.03 for Felty's syndrome, wrist
M05.04 for Felty's syndrome, hand
M05.05 for Felty's syndrome, hip
M05.06 for Felty's syndrome, knee
M05.07 for Felty's syndrome, ankle and foot
Use M05.09 for Felty's syndrome, multiple sites
M05.1 for Rheumatoid lung disease with rheumatoid arthritis
Use M05.10 for Rheumatoid lung disease with rheumatoid arthritis of unspecified site
M05.11 for Rheumatoid lung disease with rheumatoid arthritis of shoulder
M05.12 for Rheumatoid lung disease with rheumatoid arthritis of elbow
M05.13 for Rheumatoid lung disease with rheumatoid arthritis of wrist
M05.14 for Rheumatoid lung disease with rheumatoid arthritis of hand
M05.15 for Rheumatoid lung disease with rheumatoid arthritis of hip
M05.16 for Rheumatoid lung disease with rheumatoid arthritis of knee
M05.17 for Rheumatoid lung disease with rheumatoid arthritis of ankle and foot
Use M05.19 for Rheumatoid lung disease with rheumatoid arthritis of multiple sites
M05.2 for Rheumatoid vasculitis with rheumatoid arthritis
Use M05.20 for Rheumatoid vasculitis with rheumatoid arthritis of unspecified site
M05.21 for Rheumatoid vasculitis with rheumatoid arthritis of shoulder
M05.22 for Rheumatoid vasculitis with rheumatoid arthritis of elbow
M05.23 for Rheumatoid vasculitis with rheumatoid arthritis of wrist
M05.24 for Rheumatoid vasculitis with rheumatoid arthritis of hand
M05.25 for Rheumatoid vasculitis with rheumatoid arthritis of hip
M05.26 for Rheumatoid vasculitis with rheumatoid arthritis of knee
M05.27 for Rheumatoid vasculitis with rheumatoid arthritis of ankle and foot
Use M05.29 for Rheumatoid vasculitis with rheumatoid arthritis of multiple sites
M05.3 for Rheumatoid heart disease with rheumatoid arthritis
Use M05.30 for Rheumatoid heart disease with rheumatoid arthritis of unspecified site
M05.31 for Rheumatoid heart disease with rheumatoid arthritis of shoulder
M05.32 for Rheumatoid heart disease with rheumatoid arthritis of elbow
M05.33 for Rheumatoid heart disease with rheumatoid arthritis of wrist
M05.34 for Rheumatoid heart disease with rheumatoid arthritis of hand
M05.35 for Rheumatoid heart disease with rheumatoid arthritis of hip
M05.36 for Rheumatoid heart disease with rheumatoid arthritis of knee
M05.37 for Rheumatoid heart disease with rheumatoid arthritis of ankle and foot
Use M05.39 for Rheumatoid heart disease with rheumatoid arthritis of multiple sites
M05.4 for Rheumatoid myopathy with rheumatoid arthritis
Use M05.40 for Rheumatoid myopathy with rheumatoid arthritis of unspecified site
M05.41 for Rheumatoid myopathy with rheumatoid arthritis of shoulder
M05.42 for Rheumatoid myopathy with rheumatoid arthritis of elbow
M05.43 for Rheumatoid myopathy with rheumatoid arthritis of wrist
M05.44 for Rheumatoid myopathy with rheumatoid arthritis of hand
M05.45 for Rheumatoid myopathy with rheumatoid arthritis of hip
M05.46 for Rheumatoid myopathy with rheumatoid arthritis of knee
M05.47 for Rheumatoid myopathy with rheumatoid arthritis of ankle and foot
Use M05.49 for Rheumatoid myopathy with rheumatoid arthritis of multiple sites
M05.5 for Rheumatoid polyneuropathy with rheumatoid arthritis
Use M05.50 for Rheumatoid polyneuropathy with rheumatoid arthritis of unspecified site
M05.51 for Rheumatoid polyneuropathy with rheumatoid arthritis of shoulder
M05.52 for Rheumatoid polyneuropathy with rheumatoid arthritis of elbow
M05.53 for Rheumatoid polyneuropathy with rheumatoid arthritis of wrist
M05.54 for Rheumatoid polyneuropathy with rheumatoid arthritis of hand
M05.55 for Rheumatoid polyneuropathy with rheumatoid arthritis of hip
M05.56 for Rheumatoid polyneuropathy with rheumatoid arthritis of knee
M05.57 for Rheumatoid polyneuropathy with rheumatoid arthritis of ankle and foot
Use M05.59 for Rheumatoid polyneuropathy with rheumatoid arthritis of multiple sites
M05.6 for Rheumatoid arthritis with involvement of other organs and systems
Use M05.60 for Rheumatoid arthritis of unspecified site with involvement of other organs and systems
M05.61 for Rheumatoid arthritis of shoulder with involvement of other organs and systems
M05.62 for Rheumatoid arthritis of elbow with involvement of other organs and systems
M05.63 for Rheumatoid arthritis of wrist with involvement of other organs and systems
M05.64 for Rheumatoid arthritis of hand with involvement of other organs and systems
M05.65 for Rheumatoid arthritis of hip with involvement of other organs and systems
M05.66 for Rheumatoid arthritis of knee with involvement of other organs and systems
M05.67 for Rheumatoid arthritis of ankle and foot with involvement of other organs and systems
Use M05.69 for Rheumatoid arthritis of multiple sites with involvement of other organs and systems
M05.7 for Rheumatoid arthritis with rheumatoid factor without organ or systems involvement
Use M05.70 for Rheumatoid arthritis with rheumatoid factor of unspecified site without organ or systems involvement
M05.71 for Rheumatoid arthritis with rheumatoid factor of shoulder without organ or systems involvement
M05.72 for Rheumatoid arthritis with rheumatoid factor of elbow without organ or systems involvement
M05.73 for Rheumatoid arthritis with rheumatoid factor of wrist without organ or systems involvement
M05.74 for Rheumatoid arthritis with rheumatoid factor of hand without organ or systems involvement
M05.75 for Rheumatoid arthritis with rheumatoid factor of hip without organ or systems involvement
M05.76 for Rheumatoid arthritis with rheumatoid factor of knee without organ or systems involvement
M05.77 for Rheumatoid arthritis with rheumatoid factor of ankle and foot without organ or systems involvement
Use M05.79 for Rheumatoid arthritis with rheumatoid factor of multiple sites without organ or systems involvement
Use M05.7A for Rheumatoid arthritis with rheumatoid factor of other specified site without organ or systems involvement
M05.8 for Other rheumatoid arthritis with rheumatoid factor
Use M05.80 for Other rheumatoid arthritis with rheumatoid factor of unspecified site
M05.81 for Other rheumatoid arthritis with rheumatoid factor of shoulder
M05.82 for Other rheumatoid arthritis with rheumatoid factor of elbow
M05.83 for Other rheumatoid arthritis with rheumatoid factor of wrist
M05.84 for Other rheumatoid arthritis with rheumatoid factor of hand
M05.85 for Other rheumatoid arthritis with rheumatoid factor of hip
M05.86 for Other rheumatoid arthritis with rheumatoid factor of knee
M05.87 for Other rheumatoid arthritis with rheumatoid factor of ankle and foot
Use M05.89 for Other rheumatoid arthritis with rheumatoid factor of multiple sites
Use M05.8A for Other rheumatoid arthritis with rheumatoid factor of other specified site
Use M05.9 for Rheumatoid arthritis with rheumatoid factor, unspecified
Use M05.A for Abnormal rheumatoid factor and anti-citrullinated protein antibody with rheumatoid arthritis
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 1 Excludes
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Patient EducationClinical
Rheumatoid Arthritis
Rheumatoid arthritis (RA) is a form of arthritis that causes pain, swelling, and stiffness in your joints. RA is an autoimmune disease. Although it is most common in the wrist and fingers, this disease can cause your immune system to attack any joint tissue. The inflammation (swelling) that comes with RA can also affect other body parts.
The full article covers:
- What is rheumatoid arthritis?
- Who is more likely to get rheumatoid arthritis?
- What causes rheumatoid arthritis?
- What are the symptoms of rheumatoid arthritis?
- How is rheumatoid arthritis diagnosed?
- What are the treatments for rheumatoid arthritis?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Code HistoryHistory
FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.
Questions About M05Overview
Is M05 (Rheumatoid arthritis with rheumatoid factor) a billable code?
No. This is a category header that groups the codes for rheumatoid arthritis with rheumatoid factor, and headers cannot be submitted on claims. Claims for rheumatoid arthritis with rheumatoid factor need a more specific code from this category, such as M05.00, M05.011, and M05.012.
